Questions tagged [pset1-credit]
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10
questions
0
votes
0answers
12 views
segmentation fault when i compile my program
int main(void)
{
long long cardnumber = 0, calc;
//string credit[1];
//string lengthkey[1];
string credit[1];
string lengthkey[1];
int countcardcharacters = 0;
//user ...
0
votes
1answer
34 views
How do you find the first digit of a long number?
I wrote the following code to try to find the first digit of a long number (this is for the CS50x "Credit" exercise), but it's not working. Any tips?
// Conditions and relational operators
#...
0
votes
1answer
30 views
Stuck with pset1 credit question. I don't know why I'm not able to get any “Valid” outputs when a valid card number is entered
#include <stdio.h>
#include <cs50.h>
#include <math.h>
#include <stdlib.h>
int main (void)
{
int count = 0; //Declare counter
//Get input from user
long number = get_long (&...
0
votes
1answer
35 views
trying to check second to last digit— cs50 pset 1 #credit#
I am trying to understand the second to last digit thing, i think i have been coding wrong the whole time.
take this example 45002136581 in the walk through the guy says we take 5 0 2 1 5 1. while i ...
0
votes
1answer
23 views
PSET 1 Credit AMEX
I've calculated the Luhn's algorithm for all the credit cards and it works fine. The only issue I have is that the American Express cards which are tested don't fulfill the Luhn's algorithm!
This is ...
0
votes
1answer
55 views
cs50 pset1 credit expected expression error
So, I have gotten rid of all the errors and got the code to the point to prompt the user for the credit card number and output an answer the only problem is the program falls thru to invalid every ...
0
votes
1answer
136 views
How To Use a For Loop To Store Values Into Multiple Variables?
I'm working on the Credit problem set. Along the way, I've encountered a scenario where I want to use a for loop to store multiple values. If I type printf("%d", cc_number[p]); in that for loop, it ...
0
votes
1answer
28 views
Help in PSET1: Credit. Check50 not showing up
I finished (what I think) is a correct version of credit and when I submit, I only see marks for style and no check50 on the submit50 page.
Also, when I do check50 in the terminal window, I get a "...
0
votes
1answer
82 views
Credit.c works, but not completely?
So I finished credit.c today and was trying out different numbers from the paypal website the course provided and got some unexpected results and don't know what to do with it. When I type in valid ...
1
vote
2answers
124 views
error at while loop cs50 Pset1 credit
I am getting an error at while loop it says
error: '&&' within '||' [-Werror,-Wlogical-op-parentheses]
while((credit % 10 >= 0) && (i < 15) || (i < 16))
here is my ...
